Gray (arm) was yanked after four innings against the Yankees on Wednesday with arm fatigue, Nick Groke of the Denver Post reports.
Gray will be reevaluated Thursday with an injury that he said "has been that way for a couple weeks" and "it's just now getting to a serious point." He has struggled with his command during his most recent starts but is still hopeful that he will be on the mound Monday against the Blue Jays.